New class.

src/HttpHeaderProcessor.cc

@@ -0,0 +1,124 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#include "HttpHeaderProcessor.h"
+#include "message.h"
+#include "DlRetryEx.h"
+#include "DlAbortEx.h"
+#include "Util.h"
+
+void HttpHeaderProcessor::update(const char* data, int32_t length)
+{
+  checkHeaderLimit(length);
+  strm.write(data, length);
+}
+
+void HttpHeaderProcessor::update(const string& data)
+{
+  checkHeaderLimit(data.size());
+  strm << data;
+}
+
+void HttpHeaderProcessor::checkHeaderLimit(int32_t incomingLength)
+{
+  strm.seekg(0, ios::end);
+  if((int32_t)strm.tellg()+incomingLength > _limit) {
+    throw new DlAbortEx("Too large http header");
+  }
+}
+
+bool HttpHeaderProcessor::eoh() const
+{
+  string str = strm.str();
+  if(str.find("\r\n\r\n") == string::npos && str.find("\n\n") == string::npos) {
+    return false;
+  } else {
+    return true;
+  }
+}
+
+int32_t HttpHeaderProcessor::getPutBackDataLength() const
+{
+  string str = strm.str();
+  string::size_type delimpos = string::npos;
+  if((delimpos = str.find("\r\n\r\n")) != string::npos) {
+    return str.size()-(delimpos+4);
+  } else if((delimpos = str.find("\n\n")) != string::npos) {
+    return str.size()-(delimpos+2);
+  } else {
+    return 0;
+  }
+}
+
+void HttpHeaderProcessor::clear()
+{
+  strm.str("");
+}
+
+pair<string, HttpHeaderHandle> HttpHeaderProcessor::getHttpStatusHeader()
+{
+  strm.seekg(0, ios::beg);
+  string line;
+  getline(strm, line);  
+  // check HTTP status value
+  if(line.size() <= 12) {
+    throw new DlRetryEx(EX_NO_STATUS_HEADER);
+  }
+  string status = line.substr(9, 3);
+  HttpHeaderHandle httpHeader = new HttpHeader();
+  while(getline(strm, line)) {
+    line = Util::trim(line);
+    if(line.empty()) {
+      break;
+    }
+    pair<string, string> hp;
+    Util::split(hp, line, ':');
+    httpHeader->put(hp.first, hp.second);
+  }
+  
+  return pair<string, HttpHeaderHandle>(status, httpHeader);
+}
+
+string HttpHeaderProcessor::getHeaderString() const
+{
+  string str = strm.str();
+  string::size_type delimpos = string::npos;
+  if((delimpos = str.find("\r\n\r\n")) != string::npos ||
+     (delimpos = str.find("\n\n")) != string::npos) {
+    return str.substr(0, delimpos);
+  } else {
+    return str;
+  }
+}
+

src/HttpHeaderProcessor.h

@@ -0,0 +1,83 @@
+/* <!-- copyright */
+/*
+ * aria2 - The high speed download utility
+ *
+ * Copyright (C) 2006 Tatsuhiro Tsujikawa
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * In addition, as a special exception, the copyright holders give
+ * permission to link the code of portions of this program with the
+ * OpenSSL library under certain conditions as described in each
+ * individual source file, and distribute linked combinations
+ * including the two.
+ * You must obey the GNU General Public License in all respects
+ * for all of the code used other than OpenSSL.  If you modify
+ * file(s) with this exception, you may extend this exception to your
+ * version of the file(s), but you are not obligated to do so.  If you
+ * do not wish to do so, delete this exception statement from your
+ * version.  If you delete this exception statement from all source
+ * files in the program, then also delete it here.
+ */
+/* copyright --> */
+#ifndef _D_HTTP_HEADER_PROCESSOR_H_
+#define _D_HTTP_HEADER_PROCESSOR_H_
+
+#include "common.h"
+#include "HttpHeader.h"
+#include <utility>
+#include <sstream>
+
+class HttpHeaderProcessor {
+private:
+  stringstream strm;
+  int32_t _limit;
+
+  void checkHeaderLimit(int32_t incomingLength);
+
+public:
+  HttpHeaderProcessor():_limit(4096) {}
+
+  ~HttpHeaderProcessor() {}
+
+  void update(const char* data, int32_t length);
+
+  void update(const string& data);
+
+  /**
+   * Returns true if end of header is reached.
+   */
+  bool eoh() const;
+
+  /**
+   * Retruns the number of bytes beyond the end of header.
+   */
+  int32_t getPutBackDataLength() const;
+
+  pair<string, HttpHeaderHandle> getHttpStatusHeader();
+
+  string getHeaderString() const;
+
+  void clear();
+
+  void setHeaderLimit(int32_t limit)
+  {
+    _limit = limit;
+  }
+};
+
+typedef SharedHandle<HttpHeaderProcessor> HttpHeaderProcessorHandle;
+
+#endif // _D_HTTP_HEADER_PROCESSOR_H_